package com.homework.work01;

public class IdentifierDemo {
    public static void main(String[] args) {
        //数字不能开头
        //int 1a = 2;
        //数字字母_$组成
        int a1_$ = 3;
        //驼峰式
        int userAge = 12;
        final char USER_SEX = '女';
    }
}
